双开口室内热压自然对流模拟及热源分析  

Simulation of Indoor Heat Press Natural Convection with Double Openings and Thermal Source Analysis

作　　者：李林[1] 肖婷[1] 廖婉婷[2] 赵福云[1,2] 王汉青[1] 

机构地区：[1]湖南工业大学土木工程学院,湖南株洲412007 [2]武汉大学动力与机械学院,湖北武汉430072

出　　处：《湖南工业大学学报》2016年第2期1-7,共7页Journal of Hunan University of Technology

基　　金：国家自然科学基金资助项目(51208192;51304233);湖南省杰出青年基金资助项目(14JJ1002);科技部十二五科技支持计划基金资助项目(2011BAJ03B07)

摘　　要：以不同热源位置下的单侧双开口室内热压自然对流换热过程为研究对象,采用FVM方法对质量守恒方程、能量守恒方程进行离散求解,研究不同热瑞利数Ra（Ra=10^3～10^6）和不同热源位置的情况下,室内流体流线、等温线分布特征以及平均努赛尔数Nuav的变化。研究结果表明：随着Ra的增大,室内空气对流强度增大,对流热交换效果明显;在高Ra下,随着热源到左墙面距离与地面长度比D的增大,室内出现的漩涡增多;D=0.25时,Nuav在不同的Ra下均为最大值,热源的位置对换热量的影响较大;在同一Ra下,随着D的增大,室内对流换热效果越差;在不同D下,Nuav是以Ra为自变量的幂指数函数,拟合后其线性相关性可达96.2%。The heat transfer process of unilateral double open indoor thermal press natural convection is taken as a research object. FVM method is used to solve the mass conservation equation and energy conservation equation. Streamlines,isotherms and variations of average Nusselt number Nuav are studied under the conditions of different Ra（Ra=103～106）and different thermal source locations. Research indicates that： with the increase of Ra, indoor air convection intensifies and the convection heat exchange effect is obvious, and with high Ra and increasing D, the indoor swirl appears increasing.In the case of D=0.25, Nuav all reach maximum under different Ra, and the thermal location has great effect on heat exchange.Under the same Ra, indoor heat exchange effect is worse with increasing D, and under different D, Nuav is a power exponent function with Ra as the independent variable, and its linear correlation fitting reaches 96.2%.

关 键 词：热压自然对流 内部热源 等温线 平均努赛尔数 

分 类 号：TU111[建筑科学—建筑理论]